The dominant religion of Westeros is that of the Seven. With the exception of those born in the North or the Iron Islands, all people in Westeros are raised to follow the Seven. The faithful worship a single deity with seven aspects or faces, each representing a different virtue. Worshippers pray to specific aspects of the Seven for help and guidance depending on their need. The aspects are:
Some pockets in the north still worship the Old Gods, most notably House Stark and their bannermen. The religion of the Old Gods has no organization, clergy, evangelical movements, or holy texts, but some traditions are passed down by their followers. Weirwood trees with faces carved into them, called heart trees, are considered sacred. Prayer, oaths, and marriages are often performed in the presence of a heart tree. It is said that the faces were carved into the weirwoods by the children of the forest, but their meaning or purpose is not completely understood by humans.
A sea deity worshipped solely by the men of the Iron Islands. Not much is known of this god outside of islands, and until recently, it was unknown for any but the ironborn to follow him. Lately there have been tales of good folk being taken in raids by the Greyjoys, and being returned changed – suddenly devout followers of the Drowned God.